示例#1
0
文件: RPC.java 项目: baeeq/hadoop-20
    public Writable call(Class<?> protocol, Writable param, long receivedTime) throws IOException {
      try {
        Invocation call = (Invocation) param;
        if (verbose) log("Call: " + call);

        Method method = protocol.getMethod(call.getMethodName(), call.getParameterClasses());
        method.setAccessible(true);

        int qTime = (int) (System.currentTimeMillis() - receivedTime);
        long startNanoTime = System.nanoTime();
        Object value = method.invoke(instance, call.getParameters());
        long processingMicroTime = (System.nanoTime() - startNanoTime) / 1000;
        if (LOG.isDebugEnabled()) {
          LOG.debug(
              "Served: "
                  + call.getMethodName()
                  + " queueTime (millisec)= "
                  + qTime
                  + " procesingTime (microsec)= "
                  + processingMicroTime);
        }
        rpcMetrics.rpcQueueTime.inc(qTime);
        rpcMetrics.rpcProcessingTime.inc(processingMicroTime);

        MetricsTimeVaryingRate m =
            (MetricsTimeVaryingRate) rpcMetrics.registry.get(call.getMethodName());
        if (m == null) {
          try {
            m = new MetricsTimeVaryingRate(call.getMethodName(), rpcMetrics.registry);
          } catch (IllegalArgumentException iae) {
            // the metrics has been registered; re-fetch the handle
            LOG.debug("Error register " + call.getMethodName(), iae);
            m = (MetricsTimeVaryingRate) rpcMetrics.registry.get(call.getMethodName());
          }
        }
        // record call time in microseconds
        m.inc(processingMicroTime);

        if (verbose) log("Return: " + value);

        return new ObjectWritable(method.getReturnType(), value);

      } catch (InvocationTargetException e) {
        Throwable target = e.getTargetException();
        if (target instanceof IOException) {
          throw (IOException) target;
        } else {
          IOException ioe = new IOException(target.toString());
          ioe.setStackTrace(target.getStackTrace());
          throw ioe;
        }
      } catch (Throwable e) {
        if (!(e instanceof IOException)) {
          LOG.error("Unexpected throwable object ", e);
        }
        IOException ioe = new IOException(e.toString());
        ioe.setStackTrace(e.getStackTrace());
        throw ioe;
      }
    }
示例#2
0
      @Override
      public Writable call(
          org.apache.hadoop.ipc.RPC.Server server,
          String protocolName,
          Writable rpcRequest,
          long receivedTime)
          throws IOException {
        try {
          Invocation call = (Invocation) rpcRequest;
          if (server.verbose) log("Call: " + call);

          // Verify rpc version
          if (call.getRpcVersion() != writableRpcVersion) {
            // Client is using a different version of WritableRpc
            throw new IOException(
                "WritableRpc version mismatch, client side version="
                    + call.getRpcVersion()
                    + ", server side version="
                    + writableRpcVersion);
          }

          long clientVersion = call.getProtocolVersion();
          final String protoName;
          ProtoClassProtoImpl protocolImpl;
          if (call.declaringClassProtocolName.equals(VersionedProtocol.class.getName())) {
            // VersionProtocol methods are often used by client to figure out
            // which version of protocol to use.
            //
            // Versioned protocol methods should go the protocolName protocol
            // rather than the declaring class of the method since the
            // the declaring class is VersionedProtocol which is not
            // registered directly.
            // Send the call to the highest  protocol version
            VerProtocolImpl highest =
                server.getHighestSupportedProtocol(RPC.RpcKind.RPC_WRITABLE, protocolName);
            if (highest == null) {
              throw new IOException("Unknown protocol: " + protocolName);
            }
            protocolImpl = highest.protocolTarget;
          } else {
            protoName = call.declaringClassProtocolName;

            // Find the right impl for the protocol based on client version.
            ProtoNameVer pv = new ProtoNameVer(call.declaringClassProtocolName, clientVersion);
            protocolImpl = server.getProtocolImplMap(RPC.RpcKind.RPC_WRITABLE).get(pv);
            if (protocolImpl == null) { // no match for Protocol AND Version
              VerProtocolImpl highest =
                  server.getHighestSupportedProtocol(RPC.RpcKind.RPC_WRITABLE, protoName);
              if (highest == null) {
                throw new IOException("Unknown protocol: " + protoName);
              } else { // protocol supported but not the version that client wants
                throw new RPC.VersionMismatch(protoName, clientVersion, highest.version);
              }
            }
          }

          // Invoke the protocol method

          long startTime = Time.now();
          Method method =
              protocolImpl.protocolClass.getMethod(
                  call.getMethodName(), call.getParameterClasses());
          method.setAccessible(true);
          server.rpcDetailedMetrics.init(protocolImpl.protocolClass);
          Object value = method.invoke(protocolImpl.protocolImpl, call.getParameters());
          int processingTime = (int) (Time.now() - startTime);
          int qTime = (int) (startTime - receivedTime);
          if (LOG.isDebugEnabled()) {
            LOG.debug(
                "Served: "
                    + call.getMethodName()
                    + " queueTime= "
                    + qTime
                    + " procesingTime= "
                    + processingTime);
          }
          server.rpcMetrics.addRpcQueueTime(qTime);
          server.rpcMetrics.addRpcProcessingTime(processingTime);
          server.rpcDetailedMetrics.addProcessingTime(call.getMethodName(), processingTime);
          if (server.verbose) log("Return: " + value);

          return new ObjectWritable(method.getReturnType(), value);

        } catch (InvocationTargetException e) {
          Throwable target = e.getTargetException();
          if (target instanceof IOException) {
            throw (IOException) target;
          } else {
            IOException ioe = new IOException(target.toString());
            ioe.setStackTrace(target.getStackTrace());
            throw ioe;
          }
        } catch (Throwable e) {
          if (!(e instanceof IOException)) {
            LOG.error("Unexpected throwable object ", e);
          }
          IOException ioe = new IOException(e.toString());
          ioe.setStackTrace(e.getStackTrace());
          throw ioe;
        }
      }